H20 RELEASE UNITS

When you buy a Hammar H20 Hydrostatic Release Unit (HRU), you don't just get the market's best-selling release unit. You also get a sample of our long history and tradition of safety at sea. Hammar has by far the broadest product range on the market.

SAVING LIVES AT SEA FOR MORE THAN 30 YEARS

The Hammar H20 is the best-selling HRU in the world, and it has been saving lives on the oceans for more than 30 years. Its safe, reliable, and simple design has earned more worldwide approval than any other unit.

The H20 needs no annual service, maintenance, or spare parts. You simply install a new unit and dispose of the old once it has reached the end of service life.

WHAT DOES AN HRU DO?

If the vessel sinks, the increasing water pressure activates the Hammar H20. It automatically releases the liferafts, EPIRBs (Emergency Position Indicating Radio Beacons), or other life-saving appliances it is connected to.

The Hammar H20 is designed to be safe and reliable in all extreme conditions that you and your ship might meet on the oceans. The Manual Release Units (MRU) and Electronic Release Units (ERU) allow for a smooth, controlled release in an early stage of abandoning the ship without compromising the hydrostatic function.

 

THE HAMMAR H20 - HOW IT WORKS

Inside the Hammar H20, a pin under tension sits in a notch of a spring-loaded knife. The pin is attached to the center of a flexible membrane. At the intended depth, water acts on the membrane pushing it inwards and out of the notch. When the pin is fully out of the notch, the blade can instantly spring forward, cutting through the strong rope and releasing the lashing.

The Weak Link holds the painter line assuring the necessary pull to inflate the raft as the buoyancy of the liferaft container floats towards the surface. The increased buoyancy of the inflated liferaft will cause the Weak Link to break, and the raft can surface.

The Hammar H20 is designed to cut through the White Strong Rope but may, in some applications, also cut the unshielded electrical cable.

BETTER SOLUTIONS FOR SAFETY AT SEA

By actively developing new safety products, Hammar leads the way towards increased safety on the seven seas. We have done so for more than 160 years.

THREE DIFFERENT TYPES OF RELEASE UNITS

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HYDROSTATIC RELEASE UNIT

The Hammar H20 is the simplest way to gain free float capability on your life-saving appliances.

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MANUAL RELEASE UNIT

The Hammar H20 is a key component in Manual Remote Release Systems (MRRS). These systems are durable for the controlled release of life-saving appliances such as liferafts or Marine Evacuation Systems (MES).

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ELECTRONIC RELEASE UNIT

The ERU allows for complex installations involving several release units in an Electronic Remote Release System (ERRS). One system makes it possible to release a vessel's life-saving appliances all at once, user-selected or in a predetermined order.

H20 DUAL ASSEMBLY

The H20 Dual Assembly is a combination of release units that includes two or more H20 units and/or has two connection points to the deck. The H20 Dual Assembly is used in raft arrangements and RRS when more than one release criteria are fulfilled.

 

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MARCODE - VALIDATING SAFETY AT SEA

Be assured of the crew and passengers' safety with MarCode validation equipment. Hammar is always striving to bring you better solutions for safety at sea. This MarCode gives you a tool to check the validity and authenticity of all your Hammar H20 products, even at sea. Scanning and registering your MarCode tag will create a digital link between your H20 unit and the ship it has been installed on. The MarCode app will also give you relevant certificates, such as the Declaration of Conformity (DoC) and Certificate of Conformity.

(CoC) for your H20. It is quick and easy to scan and check the MarCode – validating safety at sea.

Download the Hammar MarCode app from:

APPLICATIONS

H20 R

H20 R FOR RAFTS

The Hammar H20 SOLAS model is designed for liferafts from six up to 150 persons.

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H20 FOR EPIRBS

In an emergency, the automatic release of the EPIRB will dramatically facilitate the rescue operation and the possibility to save lives. The Hammar H20 E is the most reliable hydrostatic release unit on the market and is used by leading EPIRB manufacturers.

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H20 FOR MES

In MES, the Hammar H20 is, in many cases, a core component for the activation of the system. The H20 units offer various combinations in terms of activation depth, rope length, and release options.

H20 FOR SMALL RAFTS

The SOLAS regulation is viable for vessels over 500 gross tons, affecting the size of liferafts used and criteria set up for the HRU. The H20 for small rafts is designed to fit smaller liferafts, not exerting the same pull from buoyancy when released. The Weak Link on an H20 for small rafts is optimized for smaller rafts with a lower force needed to release the raft after activation.

The Hammar H20 for small rafts (HR-0200) is designed for USCG (United States Coast Guard) approved liferafts less than six persons and all recreational rafts up to 12 persons (outside SOLAS regulation).

HOW TO READ INFORMATION ON A H20

THE DATE LABEL

The date label should be marked with an expiry date (month/year) on an installed unit. The expiry date is two years or otherwise stated on the product from the month of installation onboard.

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THE TOP LABELS

The top label of an H20 comes in many colors and contains the information you need to be aware of.

NO MAINTENANCE REQUIRED

The H20 needs no annual service, maintenance, or spare parts. You simply install a new unit and dispose of the old once it has reached the end of service life.

Note that the H20 should not be subjected to power washing or painted. If an H20 is dropped or exposed to an impact, it should be discarded.

 

EASY RELEASE SLIP HOOK FOR H20 R

In the emergency of abandoning the ship, an early and controlled release of liferafts can save lives at sea. Manual release and launch of a liferaft is the way to evacuate in a controlled manner before the vessel is going down.

The Hammar Easy Release for H20 R can easily be operated using just one hand, even under its maximum lashing load. The Easy Release can be installed with a Hammar H20 or a manual release-only configuration. The design makes it possible to retrofit into an existing installation.

FREQUENTLY ASKED QUESTIONS

 

 

 

CANT FIND YOUR ANSWER?

H20 IN REMOTE RELEASE SYSTEMS

The Hammar H20 can also be combined with Hammar's RRS, enabling you to release life-saving appliances from the bridge or other strategic locations onboard. This means that in an emergency, you can save precious time and possibly also lives.

During normal operation, RRS will allow you to free valuable deck space by placing life-saving appliances in more inconvenient areas without compromising safety. You can find more information about our RSS here.

Where to buy?

Find your closest Hammar Distributor